Adjustable supporting-rest



UNITED STATES `PATENT OFFICE.

LEO EVALD, OF MINNEAPOLIS, MINNESOTA.k

ADJUSTABLE SUPPORTING-REST.

SPECIFICATION forming part of Letters Patent No. 443,847, dated December 30, 1890.

Application filed January 7,1890. Serial No. 336,212. (No model.) l

To all whom t may concern.-

Be it known that I, LEO EWALD, a citizen of the United States, residing at Minneapolis,

in the county of Hennepin and the State ofv Minnesota, have invented an Improvement in Adjustable Supporting-Rests, of which the following is a specification.

My invention relates to an improvement in adjustable supporting-rests for use on turning-lathes, center-machines, dac., in which the supporting-screw is adjusted by means of va nut; and the objects of myimprovement are, iirst, to obtain a supportingrest that can easilybe adj usted up to or lowered away from the work; second,a supporting-rest that will permit its load being swung endy for end or around without raising or lowering saine; third, to prevent the su pport-screw thread from being roughened or burred with thumb or set screw. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure lis a top View; Fig. 2, a cross-section of entire device on line A A, Fig. l; Fig. La perspective view of nut, and Fig. 4 a perspective View of set-screw plug.

Similar letters refer to similar parts throughout the several views. e

D (shown in Figs. 1 and 2) represents the main stand as preferred for use on turning-lathes. It is constructed with V-shaped grooves that 'tit- V-ways on turning-lathes. In the middle of said main stand is hole H, for the reception of support-screw. I do not, however, confine myself to this construction of said main stand, as a piece of wood or a piece ot' iron with a hole in it will answer the same purpose.

E represents the support-screw shown in Fig. Its upper end may be made forked for the reception of its load. Its body has ordinary screw-thread cut on same, and itting into hole H in the main stand a loose lit.

C, Fig. 3, is a nut, also shown in Fig. 2,that

.made flat.

fit-s onto said support-screw and rests on the main stand. Said nut may be provided with horizontal holes for the insertion of a lever or bar to turn it with.

F in nut C (shown in Fig. 2) represents an ordinary 4thumb or set screw used to secure said nut to said support-screw, when so desired.

B, Fig. 4, and also shown in position in nut C, Fig. 2, is a set-screw plug, constructed so as to tit loosely into the set-screw hole. rlh'e end where the set-screw bears on said plugis The other end on said plug has projection fi t', that fits between and bears on the bottom of the thread on support-screw when set-screw is tightened against said plug. Consequently said set-screw cannot burr or rough the thread on the support-screw.

The opera-tion of the adjustable supportin g-rest will best be seen by referring to Fig. 2. Turning nut C to the left or right will raise or lower the support-screw Eor the load that may be placed on same, and tightening up on set-screw F will fasten nut C to said su pport-screw and prevent said support-screw from screwing down or up when a load is swung around on said rest.

That I claim as my invention, and desire to secure by Letters Patent, is-

l. The combination, in an adjustable supporting-rest, of a main stand having hole H, support-screw E, and nut O, resting on main stand for adjusting said support-screw, substantially as described.

2. The set-screw plug B,having the projectionsi t on same, substantially as shown, for the purpose specified.

The combination, in an adjustable supporting-rest, of nut C, set-screw F, and setscrew plug B, all substantially as set forth.

y LEO EVVALD. Witnesses:

ROBERT BRADLEY, J. H. VANDEvooRT. 

